/*******************************************************************************
 * Copyright (c) 2009 Kevin Bierhoff and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Kevin Bierhoff - initial API and implementation
 *******************************************************************************/
package com.googlecode.twelfdevtools;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

/**
 * The activator class controls the plug-in life cycle
 */
public class TwelfActivator extends AbstractUIPlugin {

	// The plug-in ID
	public static final String PLUGIN_ID = "com.googlecode.twelfdevtools";

	// The shared instance
	private static TwelfActivator plugin;

	/** Image key for Twelf "type" icon */
	public static final String ICON_TWELF_TYPE = "icons/twelf_type.gif";
	/** Image key for Twelf project / config / perspective icon */
	public static final String ICON_TWELF_PRAGMA = "icons/twelf_clover.gif";
	/** Image key for Twelf project / config / perspective icon */
	public static final String ICON_TWELF_HAT = "icons/twelf_cfg.gif";
	/** Image key for elf file icon */
	public static final String ICON_ELF_FILE = "icons/file_e3.gif";

	/**
	 * The constructor
	 */
	public TwelfActivator() {
	}

	/*
	 * (non-Javadoc)
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext)
	 */
	public void start(BundleContext context) throws Exception {
		super.start(context);
		plugin = this;
	}

	/*
	 * (non-Javadoc)
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext)
	 */
	public void stop(BundleContext context) throws Exception {
		plugin = null;
		super.stop(context);
	}

	/**
	 * Returns the shared instance
	 *
	 * @return the shared instance
	 */
	public static TwelfActivator getDefault() {
		return plugin;
	}

	public Image getImage(String imageKey) {
		Image result = getImageRegistry().get(imageKey);
		if (result != null)
			return result;
		// image not in registry
		// treat key as path and add it
		getImageRegistry().put(imageKey, getImageDescriptor(imageKey));
		return getImageRegistry().get(imageKey);
	}

	@Override
	protected void initializeImageRegistry(ImageRegistry reg) {
		super.initializeImageRegistry(reg);
		// pre-populate outline icons
		reg.put(ICON_TWELF_TYPE, getImageDescriptor(ICON_TWELF_TYPE));
	}

	/**
	 * Returns an image descriptor for the image file at the given
	 * plug-in relative path
	 *
	 * @param path the path
	 * @return the image descriptor
	 */
	public static ImageDescriptor getImageDescriptor(String path) {
		return imageDescriptorFromPlugin(PLUGIN_ID, path);
	}

}
